D13641: [KCharSelect] Port generate-datafile.py to Python 3

[Luca Beltrame]

lbeltrame accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R236 KWidgetsAddons

REVISION DETAIL
  https://phabricator.kde.org/D13641

To: cfeck, #frameworks, lbeltrame
Cc: kde-frameworks-devel, michaelh, ngraham, bruns